… | |
… | |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
38 | * go to Ralf S. Engelschall <rse@engelschall.com>. |
39 | */ |
39 | */ |
40 | |
40 | |
41 | #include "coro.h" |
41 | #include "coro.h" |
42 | |
42 | |
|
|
43 | #include <string.h> |
|
|
44 | |
|
|
45 | /*****************************************************************************/ |
|
|
46 | /* ucontext/setjmp/asm backends */ |
|
|
47 | /*****************************************************************************/ |
|
|
48 | #if CORO_UCONTEXT || CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
49 | |
|
|
50 | # if CORO_UCONTEXT |
|
|
51 | # include <stddef.h> |
|
|
52 | # endif |
|
|
53 | |
43 | #if !defined(STACK_ADJUST_PTR) |
54 | # if !defined(STACK_ADJUST_PTR) |
|
|
55 | # if __sgi |
44 | /* IRIX is decidedly NON-unix */ |
56 | /* IRIX is decidedly NON-unix */ |
45 | # if __sgi |
|
|
46 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
57 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
47 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
58 | # define STACK_ADJUST_SIZE(sp,ss) ((ss) - 8) |
48 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
59 | # elif (__i386__ && CORO_LINUX) || (_M_IX86 && CORO_LOSER) |
49 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
60 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss)) |
50 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
61 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
51 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
62 | # elif (__amd64__ && CORO_LINUX) || ((_M_AMD64 || _M_IA64) && CORO_LOSER) |
52 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
63 | # define STACK_ADJUST_PTR(sp,ss) ((char *)(sp) + (ss) - 8) |
53 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
64 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
54 | # else |
65 | # else |
55 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
66 | # define STACK_ADJUST_PTR(sp,ss) (sp) |
56 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
67 | # define STACK_ADJUST_SIZE(sp,ss) (ss) |
57 | # endif |
68 | # endif |
58 | #endif |
69 | # endif |
59 | |
70 | |
60 | #if CORO_UCONTEXT |
|
|
61 | # include <stddef.h> |
|
|
62 | #endif |
|
|
63 | |
|
|
64 | #if CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
65 | |
|
|
66 | #include <stdlib.h> |
71 | # include <stdlib.h> |
67 | |
72 | |
68 | #if CORO_SJLJ |
73 | # if CORO_SJLJ |
69 | # include <stdio.h> |
74 | # include <stdio.h> |
70 | # include <signal.h> |
75 | # include <signal.h> |
71 | # include <unistd.h> |
76 | # include <unistd.h> |
72 | #endif |
77 | # endif |
73 | |
78 | |
74 | static volatile coro_func coro_init_func; |
79 | static coro_func coro_init_func; |
75 | static volatile void *coro_init_arg; |
80 | static void *coro_init_arg; |
76 | static volatile coro_context *new_coro, *create_coro; |
81 | static coro_context *new_coro, *create_coro; |
77 | |
|
|
78 | /* what we really want to detect here is wether we use a new-enough version of GAS */ |
|
|
79 | /* instead, check for gcc 3, ELF and GNU/Linux and hope for the best */ |
|
|
80 | #if __GNUC__ >= 3 && __ELF__ && __linux__ |
|
|
81 | # define HAVE_CFI 1 |
|
|
82 | #endif |
|
|
83 | |
82 | |
84 | static void |
83 | static void |
85 | coro_init (void) |
84 | coro_init (void) |
86 | { |
85 | { |
87 | volatile coro_func func = coro_init_func; |
86 | volatile coro_func func = coro_init_func; |
88 | volatile void *arg = coro_init_arg; |
87 | volatile void *arg = coro_init_arg; |
89 | |
88 | |
90 | coro_transfer ((coro_context *)new_coro, (coro_context *)create_coro); |
89 | coro_transfer (new_coro, create_coro); |
91 | |
90 | |
92 | func ((void *)arg); |
91 | func ((void *)arg); |
93 | |
92 | |
94 | /* the new coro returned. bad. just abort() for now */ |
93 | /* the new coro returned. bad. just abort() for now */ |
95 | abort (); |
94 | abort (); |
96 | } |
95 | } |
97 | |
96 | |
98 | # if CORO_SJLJ |
97 | # if CORO_SJLJ |
99 | |
98 | |
100 | static volatile int trampoline_count; |
99 | static volatile int trampoline_done; |
101 | |
100 | |
102 | /* trampoline signal handler */ |
101 | /* trampoline signal handler */ |
103 | static void |
102 | static void |
104 | trampoline (int sig) |
103 | trampoline (int sig) |
105 | { |
104 | { |
106 | if (setjmp (((coro_context *)new_coro)->env)) |
105 | if ( |
|
|
106 | #if _XOPEN_UNIX > 0 |
|
|
107 | _setjmp (new_coro->env) |
|
|
108 | #else |
|
|
109 | sigsetjmp (new_coro->env, 0) |
|
|
110 | #endif |
|
|
111 | ) { |
|
|
112 | coro_init (); /* start it */ |
|
|
113 | } |
|
|
114 | else |
|
|
115 | trampoline_done = 1; |
|
|
116 | } |
|
|
117 | |
|
|
118 | # endif |
|
|
119 | |
|
|
120 | # if CORO_ASM |
|
|
121 | |
|
|
122 | asm ( |
|
|
123 | ".text\n" |
|
|
124 | ".globl coro_transfer\n" |
|
|
125 | ".type coro_transfer, @function\n" |
|
|
126 | "coro_transfer:\n" |
|
|
127 | #if __amd64 |
|
|
128 | #define NUM_SAVED 6 |
|
|
129 | "\tpush %rbp\n" |
|
|
130 | "\tpush %rbx\n" |
|
|
131 | "\tpush %r12\n" |
|
|
132 | "\tpush %r13\n" |
|
|
133 | "\tpush %r14\n" |
|
|
134 | "\tpush %r15\n" |
|
|
135 | "\tmov %rsp, (%rdi)\n" |
|
|
136 | "\tmov (%rsi), %rsp\n" |
|
|
137 | "\tpop %r15\n" |
|
|
138 | "\tpop %r14\n" |
|
|
139 | "\tpop %r13\n" |
|
|
140 | "\tpop %r12\n" |
|
|
141 | "\tpop %rbx\n" |
|
|
142 | "\tpop %rbp\n" |
|
|
143 | #elif __i386 |
|
|
144 | #define NUM_SAVED 4 |
|
|
145 | "\tpush %ebp\n" |
|
|
146 | "\tpush %ebx\n" |
|
|
147 | "\tpush %esi\n" |
|
|
148 | "\tpush %edi\n" |
|
|
149 | "\tmov %esp, (%eax)\n" |
|
|
150 | "\tmov (%edx), %esp\n" |
|
|
151 | "\tpop %edi\n" |
|
|
152 | "\tpop %esi\n" |
|
|
153 | "\tpop %ebx\n" |
|
|
154 | "\tpop %ebp\n" |
|
|
155 | #else |
|
|
156 | #error unsupported architecture |
|
|
157 | #endif |
|
|
158 | "\tret\n" |
|
|
159 | ); |
|
|
160 | |
|
|
161 | # endif |
|
|
162 | |
|
|
163 | void |
|
|
164 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
|
|
165 | { |
|
|
166 | coro_context nctx; |
|
|
167 | # if CORO_SJLJ |
|
|
168 | stack_t ostk, nstk; |
|
|
169 | struct sigaction osa, nsa; |
|
|
170 | sigset_t nsig, osig; |
|
|
171 | # endif |
|
|
172 | |
|
|
173 | if (!coro) |
|
|
174 | return; |
|
|
175 | |
|
|
176 | coro_init_func = coro; |
|
|
177 | coro_init_arg = arg; |
|
|
178 | |
|
|
179 | new_coro = ctx; |
|
|
180 | create_coro = &nctx; |
|
|
181 | |
|
|
182 | # if CORO_SJLJ |
|
|
183 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
|
|
184 | |
|
|
185 | sigemptyset (&nsig); |
|
|
186 | sigaddset (&nsig, SIGUSR2); |
|
|
187 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
|
|
188 | |
|
|
189 | nsa.sa_handler = trampoline; |
|
|
190 | sigemptyset (&nsa.sa_mask); |
|
|
191 | nsa.sa_flags = SA_ONSTACK; |
|
|
192 | |
|
|
193 | if (sigaction (SIGUSR2, &nsa, &osa)) |
107 | { |
194 | { |
108 | #if HAVE_CFI |
195 | perror ("sigaction"); |
109 | asm (".cfi_startproc"); |
196 | abort (); |
110 | #endif |
197 | } |
111 | coro_init (); /* start it */ |
198 | |
112 | #if HAVE_CFI |
199 | /* set the new stack */ |
113 | asm (".cfi_endproc"); |
200 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
114 | #endif |
201 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
|
|
202 | nstk.ss_flags = 0; |
|
|
203 | |
|
|
204 | if (sigaltstack (&nstk, &ostk) < 0) |
115 | } |
205 | { |
|
|
206 | perror ("sigaltstack"); |
|
|
207 | abort (); |
|
|
208 | } |
|
|
209 | |
|
|
210 | trampoline_done = 0; |
|
|
211 | kill (getpid (), SIGUSR2); |
|
|
212 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
|
|
213 | |
|
|
214 | while (!trampoline_done) |
|
|
215 | sigsuspend (&nsig); |
|
|
216 | |
|
|
217 | sigaltstack (0, &nstk); |
|
|
218 | nstk.ss_flags = SS_DISABLE; |
|
|
219 | if (sigaltstack (&nstk, 0) < 0) |
|
|
220 | perror ("sigaltstack"); |
|
|
221 | |
|
|
222 | sigaltstack (0, &nstk); |
|
|
223 | if (~nstk.ss_flags & SS_DISABLE) |
|
|
224 | abort (); |
|
|
225 | |
|
|
226 | if (~ostk.ss_flags & SS_DISABLE) |
|
|
227 | sigaltstack (&ostk, 0); |
|
|
228 | |
|
|
229 | sigaction (SIGUSR2, &osa, 0); |
|
|
230 | sigprocmask (SIG_SETMASK, &osig, 0); |
|
|
231 | |
|
|
232 | # elif CORO_LOSER |
|
|
233 | |
|
|
234 | setjmp (ctx->env); |
|
|
235 | #if __CYGWIN__ |
|
|
236 | ctx->env[7] = (long)((char *)sptr + ssize) - sizeof (long); |
|
|
237 | ctx->env[8] = (long)coro_init; |
|
|
238 | #elif defined(_M_IX86) |
|
|
239 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
|
|
240 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
241 | #elif defined(_M_AMD64) |
|
|
242 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
|
|
243 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
244 | #elif defined(_M_IA64) |
|
|
245 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
|
|
246 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
116 | else |
247 | #else |
117 | trampoline_count++; |
248 | #error "microsoft libc or architecture not supported" |
118 | } |
|
|
119 | |
|
|
120 | # endif |
249 | #endif |
121 | |
250 | |
|
|
251 | # elif CORO_LINUX |
|
|
252 | |
|
|
253 | _setjmp (ctx->env); |
|
|
254 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
|
|
255 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
256 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
257 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
|
|
258 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
|
|
259 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize) - sizeof (long); |
|
|
260 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
|
|
261 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
|
|
262 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
263 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
|
|
264 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
265 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize) - sizeof (long); |
|
|
266 | #else |
|
|
267 | #error "linux libc or architecture not supported" |
|
|
268 | #endif |
|
|
269 | |
|
|
270 | # elif CORO_IRIX |
|
|
271 | |
|
|
272 | sigsetjmp (ctx->env, 0); |
|
|
273 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
274 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize) - sizeof (long); |
|
|
275 | |
|
|
276 | # elif CORO_ASM |
|
|
277 | |
|
|
278 | ctx->sp = (void **)(ssize + (char *)sptr); |
|
|
279 | *--ctx->sp = (void *)abort; /* needed for alignment only */ |
|
|
280 | *--ctx->sp = (void *)coro_init; |
|
|
281 | ctx->sp -= NUM_SAVED; |
|
|
282 | |
|
|
283 | # elif CORO_UCONTEXT |
|
|
284 | |
|
|
285 | getcontext (&(ctx->uc)); |
|
|
286 | |
|
|
287 | ctx->uc.uc_link = 0; |
|
|
288 | ctx->uc.uc_stack.ss_sp = sptr; |
|
|
289 | ctx->uc.uc_stack.ss_size = (size_t)ssize; |
|
|
290 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
291 | |
|
|
292 | makecontext (&(ctx->uc), (void (*)())coro_init, 0); |
|
|
293 | |
122 | #endif |
294 | # endif |
123 | |
295 | |
124 | #if CORO_ASM |
296 | coro_transfer (create_coro, new_coro); |
125 | asm ( |
297 | } |
126 | ".text\n" |
|
|
127 | ".globl coro_transfer\n" |
|
|
128 | ".type coro_transfer, @function\n" |
|
|
129 | "coro_transfer:\n" |
|
|
130 | #if __amd64 |
|
|
131 | # define NUM_SAVED 5 |
|
|
132 | "\tpush %rbx\n" |
|
|
133 | "\tpush %r12\n" |
|
|
134 | "\tpush %r13\n" |
|
|
135 | "\tpush %r14\n" |
|
|
136 | "\tpush %r15\n" |
|
|
137 | "\tmov %rsp, (%rdi)\n" |
|
|
138 | "\tmov (%rsi), %rsp\n" |
|
|
139 | "\tpop %r15\n" |
|
|
140 | "\tpop %r14\n" |
|
|
141 | "\tpop %r13\n" |
|
|
142 | "\tpop %r12\n" |
|
|
143 | "\tpop %rbx\n" |
|
|
144 | #elif __i386 |
|
|
145 | # define NUM_SAVED 4 |
|
|
146 | "\tpush %ebx\n" |
|
|
147 | "\tpush %esi\n" |
|
|
148 | "\tpush %edi\n" |
|
|
149 | "\tpush %ebp\n" |
|
|
150 | "\tmov %esp, (%eax)\n" |
|
|
151 | "\tmov (%edx), %esp\n" |
|
|
152 | "\tpop %ebp\n" |
|
|
153 | "\tpop %edi\n" |
|
|
154 | "\tpop %esi\n" |
|
|
155 | "\tpop %ebx\n" |
|
|
156 | #else |
|
|
157 | # error unsupported architecture |
|
|
158 | #endif |
|
|
159 | "\tret\n" |
|
|
160 | ); |
|
|
161 | #endif |
|
|
162 | |
298 | |
|
|
299 | /*****************************************************************************/ |
|
|
300 | /* pthread backend */ |
|
|
301 | /*****************************************************************************/ |
163 | #if CORO_PTHREAD |
302 | #elif CORO_PTHREAD |
164 | |
303 | |
|
|
304 | /* this mutex will be locked by the running coroutine */ |
|
|
305 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
|
|
306 | |
165 | struct coro_init_args { |
307 | struct coro_init_args |
|
|
308 | { |
166 | coro_func func; |
309 | coro_func func; |
167 | void *arg; |
310 | void *arg; |
168 | coro_context *self, *main; |
311 | coro_context *self, *main; |
169 | }; |
312 | }; |
170 | |
313 | |
171 | pthread_mutex_t coro_mutex = PTHREAD_MUTEX_INITIALIZER; |
314 | static pthread_t null_tid; |
|
|
315 | |
|
|
316 | /* I'd so love to cast pthread_mutex_unlock to void (*)(void *)... */ |
|
|
317 | static void |
|
|
318 | mutex_unlock_wrapper (void *arg) |
|
|
319 | { |
|
|
320 | pthread_mutex_unlock ((pthread_mutex_t *)arg); |
|
|
321 | } |
172 | |
322 | |
173 | static void * |
323 | static void * |
174 | trampoline (void *args_) |
324 | coro_init (void *args_) |
175 | { |
325 | { |
176 | struct coro_init_args *args = (struct coro_init_args *)args_; |
326 | struct coro_init_args *args = (struct coro_init_args *)args_; |
177 | coro_func func = args->func; |
327 | coro_func func = args->func; |
178 | void *arg = args->arg; |
328 | void *arg = args->arg; |
179 | |
329 | |
180 | pthread_mutex_lock (&coro_mutex); |
330 | pthread_mutex_lock (&coro_mutex); |
181 | pthread_cond_destroy (&args->self->c); |
331 | |
|
|
332 | /* we try to be good citizens and use deferred cancellation and cleanup handlers */ |
|
|
333 | pthread_cleanup_push (mutex_unlock_wrapper, &coro_mutex); |
182 | coro_transfer (args->self, args->main); |
334 | coro_transfer (args->self, args->main); |
183 | func (arg); |
335 | func (arg); |
184 | pthread_mutex_unlock (&coro_mutex); |
336 | pthread_cleanup_pop (1); |
185 | |
337 | |
186 | return 0; |
338 | return 0; |
187 | } |
339 | } |
188 | |
340 | |
189 | asm(""); |
341 | void |
190 | |
|
|
191 | void coro_transfer(coro_context *prev, coro_context *next) |
342 | coro_transfer (coro_context *prev, coro_context *next) |
192 | { |
343 | { |
193 | pthread_cond_init (&prev->c, 0); |
|
|
194 | pthread_cond_signal (&next->c); |
344 | pthread_cond_signal (&next->cv); |
195 | pthread_cond_wait (&prev->c, &coro_mutex); |
345 | pthread_cond_wait (&prev->cv, &coro_mutex); |
196 | pthread_cond_destroy (&prev->c); |
346 | #if __FreeBSD__ /* freebsd is of course broken and needs manual testcancel calls... yay... */ |
197 | } |
347 | pthread_testcancel (); |
198 | |
|
|
199 | #endif |
348 | #endif |
|
|
349 | } |
200 | |
350 | |
201 | /* initialize a machine state */ |
351 | void |
202 | void coro_create (coro_context *ctx, |
352 | coro_create (coro_context *ctx, coro_func coro, void *arg, void *sptr, long ssize) |
203 | coro_func coro, void *arg, |
|
|
204 | void *sptr, long ssize) |
|
|
205 | { |
353 | { |
206 | #if CORO_UCONTEXT |
|
|
207 | |
|
|
208 | getcontext (&(ctx->uc)); |
|
|
209 | |
|
|
210 | ctx->uc.uc_link = 0; |
|
|
211 | ctx->uc.uc_stack.ss_sp = STACK_ADJUST_PTR (sptr,ssize); |
|
|
212 | ctx->uc.uc_stack.ss_size = (size_t) STACK_ADJUST_SIZE (sptr,ssize); |
|
|
213 | ctx->uc.uc_stack.ss_flags = 0; |
|
|
214 | |
|
|
215 | makecontext (&(ctx->uc), (void (*)()) coro, 1, arg); |
|
|
216 | |
|
|
217 | #elif CORO_SJLJ || CORO_LOSER || CORO_LINUX || CORO_IRIX || CORO_ASM |
|
|
218 | |
|
|
219 | # if CORO_SJLJ |
|
|
220 | stack_t ostk, nstk; |
|
|
221 | struct sigaction osa, nsa; |
|
|
222 | sigset_t nsig, osig; |
|
|
223 | # endif |
|
|
224 | coro_context nctx; |
354 | static coro_context nctx; |
225 | |
|
|
226 | coro_init_func = coro; |
|
|
227 | coro_init_arg = arg; |
|
|
228 | |
|
|
229 | new_coro = ctx; |
|
|
230 | create_coro = &nctx; |
|
|
231 | |
|
|
232 | # if CORO_SJLJ |
|
|
233 | /* we use SIGUSR2. first block it, then fiddle with it. */ |
|
|
234 | |
|
|
235 | sigemptyset (&nsig); |
|
|
236 | sigaddset (&nsig, SIGUSR2); |
|
|
237 | sigprocmask (SIG_BLOCK, &nsig, &osig); |
|
|
238 | |
|
|
239 | nsa.sa_handler = trampoline; |
|
|
240 | sigemptyset (&nsa.sa_mask); |
|
|
241 | nsa.sa_flags = SA_ONSTACK; |
|
|
242 | |
|
|
243 | if (sigaction (SIGUSR2, &nsa, &osa)) |
|
|
244 | { |
|
|
245 | perror ("sigaction"); |
|
|
246 | abort (); |
|
|
247 | } |
|
|
248 | |
|
|
249 | /* set the new stack */ |
|
|
250 | nstk.ss_sp = STACK_ADJUST_PTR (sptr,ssize); /* yes, some platforms (IRIX) get this wrong. */ |
|
|
251 | nstk.ss_size = STACK_ADJUST_SIZE (sptr,ssize); |
|
|
252 | nstk.ss_flags = 0; |
|
|
253 | |
|
|
254 | if (sigaltstack (&nstk, &ostk) < 0) |
|
|
255 | { |
|
|
256 | perror ("sigaltstack"); |
|
|
257 | abort (); |
|
|
258 | } |
|
|
259 | |
|
|
260 | trampoline_count = 0; |
|
|
261 | kill (getpid (), SIGUSR2); |
|
|
262 | sigfillset (&nsig); sigdelset (&nsig, SIGUSR2); |
|
|
263 | |
|
|
264 | while (!trampoline_count) |
|
|
265 | sigsuspend (&nsig); |
|
|
266 | |
|
|
267 | sigaltstack (0, &nstk); |
|
|
268 | nstk.ss_flags = SS_DISABLE; |
|
|
269 | if (sigaltstack (&nstk, 0) < 0) |
|
|
270 | perror ("sigaltstack"); |
|
|
271 | |
|
|
272 | sigaltstack (0, &nstk); |
|
|
273 | if (~nstk.ss_flags & SS_DISABLE) |
|
|
274 | abort (); |
|
|
275 | |
|
|
276 | if (~ostk.ss_flags & SS_DISABLE) |
|
|
277 | sigaltstack (&ostk, 0); |
|
|
278 | |
|
|
279 | sigaction (SIGUSR2, &osa, 0); |
|
|
280 | |
|
|
281 | sigprocmask (SIG_SETMASK, &osig, 0); |
|
|
282 | |
|
|
283 | # elif CORO_LOSER |
|
|
284 | |
|
|
285 | setjmp (ctx->env); |
|
|
286 | #if __CYGWIN__ |
|
|
287 | ctx->env[7] = (long)((char *)sptr + ssize); |
|
|
288 | ctx->env[8] = (long)coro_init; |
|
|
289 | #elif defined(_M_IX86) |
|
|
290 | ((_JUMP_BUFFER *)&ctx->env)->Eip = (long)coro_init; |
|
|
291 | ((_JUMP_BUFFER *)&ctx->env)->Esp = (long)STACK_ADJUST_PTR (sptr, ssize); |
|
|
292 | #elif defined(_M_AMD64) |
|
|
293 | ((_JUMP_BUFFER *)&ctx->env)->Rip = (__int64)coro_init; |
|
|
294 | ((_JUMP_BUFFER *)&ctx->env)->Rsp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
|
|
295 | #elif defined(_M_IA64) |
|
|
296 | ((_JUMP_BUFFER *)&ctx->env)->StIIP = (__int64)coro_init; |
|
|
297 | ((_JUMP_BUFFER *)&ctx->env)->IntSp = (__int64)STACK_ADJUST_PTR (sptr, ssize); |
|
|
298 | #else |
|
|
299 | # error "microsoft libc or architecture not supported" |
|
|
300 | #endif |
|
|
301 | |
|
|
302 | # elif CORO_LINUX |
|
|
303 | |
|
|
304 | _setjmp (ctx->env); |
|
|
305 | #if __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (JB_PC) && defined (JB_SP) |
|
|
306 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
307 | ctx->env[0].__jmpbuf[JB_SP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
|
|
308 | #elif __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 0 && defined (__mc68000__) |
|
|
309 | ctx->env[0].__jmpbuf[0].__aregs[0] = (long int)coro_init; |
|
|
310 | ctx->env[0].__jmpbuf[0].__sp = (int *)((char *)sptr + ssize); |
|
|
311 | #elif defined (__GNU_LIBRARY__) && defined (__i386__) |
|
|
312 | ctx->env[0].__jmpbuf[0].__pc = (char *)coro_init; |
|
|
313 | ctx->env[0].__jmpbuf[0].__sp = (void *)((char *)sptr + ssize); |
|
|
314 | #elif defined (__GNU_LIBRARY__) && defined (__amd64__) |
|
|
315 | ctx->env[0].__jmpbuf[JB_PC] = (long)coro_init; |
|
|
316 | ctx->env[0].__jmpbuf[JB_RSP] = (long)STACK_ADJUST_PTR (sptr, ssize); |
|
|
317 | #else |
|
|
318 | # error "linux libc or architecture not supported" |
|
|
319 | #endif |
|
|
320 | |
|
|
321 | # elif CORO_IRIX |
|
|
322 | |
|
|
323 | setjmp (ctx->env); |
|
|
324 | ctx->env[JB_PC] = (__uint64_t)coro_init; |
|
|
325 | ctx->env[JB_SP] = (__uint64_t)STACK_ADJUST_PTR (sptr, ssize); |
|
|
326 | |
|
|
327 | # elif CORO_ASM |
|
|
328 | |
|
|
329 | ctx->sp = (volatile void **)(ssize + (char *)sptr); |
|
|
330 | /* we try to allow for both functions with and without frame pointers */ |
|
|
331 | *--ctx->sp = (void *)coro_init; |
|
|
332 | { |
|
|
333 | int i; |
|
|
334 | for (i = NUM_SAVED; i--; ) |
|
|
335 | *--ctx->sp = 0; |
|
|
336 | } |
|
|
337 | |
|
|
338 | # endif |
|
|
339 | |
|
|
340 | coro_transfer ((coro_context *)create_coro, (coro_context *)new_coro); |
|
|
341 | |
|
|
342 | # elif CORO_PTHREAD |
|
|
343 | |
|
|
344 | pthread_t id; |
|
|
345 | pthread_attr_t attr; |
|
|
346 | coro_context nctx; |
|
|
347 | struct coro_init_args args; |
|
|
348 | static int once; |
355 | static int once; |
349 | |
356 | |
350 | if (!once) |
357 | if (!once) |
351 | { |
358 | { |
|
|
359 | once = 1; |
|
|
360 | |
352 | pthread_mutex_lock (&coro_mutex); |
361 | pthread_mutex_lock (&coro_mutex); |
353 | once = 1; |
362 | pthread_cond_init (&nctx.cv, 0); |
|
|
363 | null_tid = pthread_self (); |
|
|
364 | } |
|
|
365 | |
|
|
366 | pthread_cond_init (&ctx->cv, 0); |
|
|
367 | |
|
|
368 | if (coro) |
354 | } |
369 | { |
|
|
370 | pthread_attr_t attr; |
|
|
371 | struct coro_init_args args; |
355 | |
372 | |
356 | args.func = coro; |
373 | args.func = coro; |
357 | args.arg = arg; |
374 | args.arg = arg; |
358 | args.self = ctx; |
375 | args.self = ctx; |
359 | args.main = &nctx; |
376 | args.main = &nctx; |
360 | |
377 | |
361 | pthread_attr_init (&attr); |
378 | pthread_attr_init (&attr); |
362 | pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
|
|
363 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
379 | pthread_attr_setstack (&attr, sptr, (size_t)ssize); |
|
|
380 | pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS); |
364 | pthread_create (&id, &attr, trampoline, &args); |
381 | pthread_create (&ctx->id, &attr, coro_init, &args); |
365 | |
382 | |
366 | pthread_cond_init (&args.self->c, 0); |
|
|
367 | coro_transfer (args.main, args.self); |
383 | coro_transfer (args.main, args.self); |
|
|
384 | } |
|
|
385 | else |
|
|
386 | ctx->id = null_tid; |
|
|
387 | } |
|
|
388 | |
|
|
389 | void |
|
|
390 | coro_destroy (coro_context *ctx) |
|
|
391 | { |
|
|
392 | if (!pthread_equal (ctx->id, null_tid)) |
|
|
393 | { |
|
|
394 | pthread_cancel (ctx->id); |
|
|
395 | pthread_mutex_unlock (&coro_mutex); |
|
|
396 | pthread_join (ctx->id, 0); |
|
|
397 | pthread_mutex_lock (&coro_mutex); |
|
|
398 | } |
|
|
399 | |
|
|
400 | pthread_cond_destroy (&ctx->cv); |
|
|
401 | } |
368 | |
402 | |
369 | #else |
403 | #else |
370 | # error unsupported backend |
404 | # error unsupported backend |
371 | #endif |
405 | #endif |
372 | } |
|
|
373 | |
406 | |